Septic tank



May 18 1926.

C. J. O'HRE ET AL SEPTIC TANK Filed March 17, 1925 ttomey `Patented May 18, 1926i.

llltlll STATES FA'EENT OFFICE.

CHARLES J'. OI'ARE AND ROBERT G. MCWILLIAMS, OF ST. PETERSBURG, FLORIDA.

snrrrc TANK.

Application filed March 17, 1825. Serial No. 16,187.

lThis invention relates to an improved septic tank. y

One feature is the particular design of the septic tank which makes for positive dissemination of the particles of the fecal matter, whereby to practically clarify the efliuent fluid before it escapes from the tank.

More specifically, an important aim of the invention is to aid the decomposition of the matter in the tank as much as possible, by properly locating and constructing the inlet and outlet and dividing the tank proper into a relatively larlge primary chamber and a comparatively small secondary chamber,

" there being a restricted passage formed in the partition between the two chambers located with respect to the normal fluid level to insureproper liquefaction of the solid matter and tothereby reduce the suspended matter which is otherwise carried by effluent fluid.

Other features and advantages of the invention will become apparent during the following description and drawing.

In the accompanying drawing, forming a part of this application, and in which like numerals are employed to designate like parts throughout the same:

Figure l is a fragmentary section and elevational view, showing the improved septic tank. l

Figure 2 is a similar view, looking down upon the top of the tank.

In Figures l and 2, we have shown the novel product, which is made with an appropriate mold. Directing attention to these figures, it will be seen that it comprises a tank 20, which is of general cylindrical configuration, the same being provided with the central internal partition 2l dividing into primary and secondary chambers or compartments 22 and 23, respectively, the last named compartment being considerably smaller than the one first named. In Figure 1, the dotted lines 24e represent approximately the normal fluid level of the tank, and it will be noted that below this level and in the partition is an elongated and rather restricted discharge slot which affords the only means of communication between the two compartments. lt will also be noted that an intake opening 26 and a discharge opening 27 are formed in the walls of the respective compartments. Each of said openings are associated with the spaced arcuate shields 28, the lower end of the shield extending a suitable distance down into the fluid in the tank, so that the incoming fecal matter is discharged into the fluid at a point below the normal level and at a point above the discharge slot 25. This predetermined association of the discharge, inlet and partition slot, together with the shield, has been followed, for this reason. It has been observed that in tanks of this class, the heavy or solid particles of the human fecal matter gravit-ate in the liquid, whereas the lighter particles rise to the top and float, forming somewhat of a crust. The intermediate fluid, however, is of a greater fluidity and is laden with a comparatively small amount of the bacteria. Thus, much of the breeding action will occur in the primary chamber, particularly upon the surface of the water. Nhen the comparatively clarified fluid passes from the primary into the secondary chamber, the

heavy particles that may be therein settle to the bottom, as the lighter particles are moved to the top, the comparatively clear fiuid rising upwardly in the shield about the discharge opening, to escape through the latter. Pipes, of course, are tapped into the openings, to conduct the matter into the tank and to convey the clarified fluid to a suitable source of deposit.

It is thought that the foregoing description, taken in connection with the accompanying drawings, will enable ,persons skilled in the art to which the invention relates to obtain a clear understanding of the same. Therefore, a more lengthy description is thought unnecessary.

Although the preferred embodiment of the invention has been shown and described, it is to be understood that minor changes coming within the field of invention claimed may be resorted to, if desired.

We claim:

A septic tank provided with an internal vertical partition extending from top to bottom and disposed at a point between the center and one side to provide relatively large and small compartments, said partition being provided with a central opening affording a passage between said compartments, intake and discharge openings formed in substantially diametrically opposed sides of the tank at points just above the normal fluid level and adjacent said partition, the intake opening being arranged on one side of the partition, and the outlet opening being arranged on the opposite side of that partition, and a pair of open ended substantially arcuate shields of duplicate design formed integral with the Wall of the tank and said partition, said shields being cooperative with the respective openings and being located on opposite sides of the partition7 having,` their upper ends extending above the norma-l fluid level and their lower ends extending below said level.

In testimony whereof We aiiix our signatures.

CHARLES J. OlHARE. ROBERT MCVVILLIAMS. 

